Hello!
This could really seems a stupid question, but I don't know how to contact English lecturers/professors and I'm starting to panic.
I've already been admitted to a PhD, that I'll start in October, but I've never spoke to none of my supervisors (I've only exchanged very few emails).
Now, I need to contact one of them and it's quite an urgent thing. He wrote me he'd be glad to have a chat on the phone too, so....what should I do now?
I already answered leaving my number,etc...then after 2 days without an answer, I called his studio number (there are no office hours AFAIK): no answer and no answerphone.

Do you think I should write another email asking for a phone appointment or should I continue to call? or is it too rude?

Thank you very much for your answer!!! Yes, I was doubtful about contacting also others exactly because of fear of being seen as playing one off against the other and that of course will put me in more troubles.
I think I will follow your suggestion and wait two weeks before going further or contact them back! I'm just in a pre-answer panic, I guess ;)
thank you very much again!!!

Hello!!! I'm a new "prospective PhD Student", and I would love to get a PhD in Humanities.
Now, I'm trying to get through all the process of contacting a supervisor: I have selected two professors and sent them my research proposal (at least a first draft of it) and my CV. They both answered very kindly that they have received my mail, they will read it carefully and contact me back "shortly". 
Now, here it's the problem: what does "shortly" mean? I know it's quite a stupid question, they have plenty of things to do, etc, but I'm quite in panic for this...could "shortly" be a few days? a week? two weeks?
and, if they are not interested, they will write me back or just I won't heard anything more? should I try to contact more possible tutors asap? should I wait for their answer?